The B -> pi Form Factor from Light-cone Sum Rules in Soft-collinear Effective Theory | Zendy

Tobias Hurth | Zendy; Fulvia De Fazio | Zendy; Thorsten Feldmann | Zendy

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The B -> pi Form Factor from Light-cone Sum Rules in Soft-collinear Effective Theory

Author(s) -

Tobias Hurth,

Fulvia De Fazio,

Thorsten Feldmann

Publication year - 2005

Language(s) - English

Resource type - Reports

DOI - 10.2172/878084

Subject(s) - physics , factorization , light cone , sum rule in quantum mechanics , particle physics , quantum chromodynamics , lambda , form factor (electronics) , hadron , meson , amplitude , order (exchange) , qcd sum rules , distribution (mathematics) , function (biology) , correlation function (quantum field theory) , quantum mechanics , mathematics , mathematical analysis , algorithm , finance , evolutionary biology , dielectric , economics , biology

Recently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory [1]. In these sum rules the short-distance scale refers to ''hard-collinear'' interactions with virtualities of order {Lambda}{sub QCD}m{sub b}. Hard scales (related to virtualities of order m{sub b}{sup 2}) are integrated out and enter via external coefficient functions in the sum rule. Soft dynamics is encoded in light-cone distribution amplitudes for the B-meson, which describe both the factorizable and non-factorizable contributions to exclusive B-meson decay amplitudes. Factorization of the correlation function has been verified to one-loop accuracy. Thus, a systematic separation of hard, hard-collinear, and soft dynamics in the heavy-quark limit is possible

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